JFileChooser实现对选定文件夹内图片自动播放和暂停播放实例代码
本案例通过使用JFileChooser实现对选定文件夹内图片实现自动播放和暂停播放
代码如下，如有不合适的地方还请指教
packagecom.xiaoqiang;
importjava.awt.Container;
importjava.awt.FlowLayout;
importjava.awt.event.ActionEvent;
importjava.awt.event.ActionListener;
importjava.io.File;
importjavax.swing.ImageIcon;
importjavax.swing.JButton;
importjavax.swing.JFileChooser;
importjavax.swing.JFrame;
importjavax.swing.JLabel;
importjava.util.Timer;
importjava.util.TimerTask;
/**
*本例通过JFileChooser选择文件夹
*对文件夹内图片进行滚动播放用到TimerTask以及ActionListener
*详细解释JFileChooser使用及图片滚动过程需要的思维
*@authorxiaoqiang
*@timer2017年4月27日
*/
publicclassPlayPictureextendsJFrameimplementsActionListener{
privateFilefileDirectory;
privateJFileChooserfileChooser;
privateContainercon;
privateJButtonnextPic;
privateJButtonpreviousPic;
privateJButtonshowPic;
privateJButtonbeginPlayPic;
privateJButtonstopPlayPic;
privateJLabelpicIcon;
privateString[]fileName;
privateStringparentPath;
privatestaticbooleanplay;
privatestaticPlayPictureplayPicture;
privateinti=-1;
privatePlayPicture(){
super("图片自动播放器");
this.draw();
}
/**
*获取单例类
*用于TimerTask执行时调用同一对象
*@returnObject
*/
publicstaticObjectgetInstance(){
if(playPicture==null)
playPicture=newPlayPicture();
returnplayPicture;
}
/**
*画图方法将GUI画出来
*因为练习图片滚动和JFileChooser
*所以GUI比较难看
*/
publicvoiddraw(){
con=this.getContentPane();
con.setLayout(newFlowLayout());
showPic=newJButton("请选择目录");
con.add(showPic);
showPic.addActionListener(this);
picIcon=newJLabel("请选择目录展示图片");
con.add(picIcon);
previousPic=newJButton("上一张");
con.add(previousPic);
previousPic.addActionListener(this);
nextPic=newJButton("下一张");
con.add(nextPic);
nextPic.addActionListener(this);
beginPlayPic=newJButton("开始自动播放");
stopPlayPic=newJButton("停止自动播放");
con.add(beginPlayPic);
con.add(stopPlayPic);
beginPlayPic.addActionListener(this);
stopPlayPic.addActionListener(this);
this.setLocation(550,200);
this.setSize(900,700);
this.setVisible(true);
}
/**
*执行自动播放效果
*注意使用的单例类
*暂停的话设置单例类静态变量
*play为false
*/
publicvoidautomatic(){
TimerTasktask=newTimerTask(){
@Override
publicvoidrun(){
((PlayPicture)PlayPicture.getInstance()).NextPicture();
if(!((PlayPicture)PlayPicture.getInstance()).play){
((PlayPicture)PlayPicture.getInstance()).previousPicture();
}
}
};
Timertimer=newTimer();
longdelay=0;
//intevalPeriod为秒数
longintevalPeriod=5*1000;
timer.scheduleAtFixedRate(task,delay,intevalPeriod);
}
@Override
publicvoidactionPerformed(ActionEvente){
if(e.getSource().equals(showPic)){
//设置G盘为默认打开路径
fileChooser=newJFileChooser(newFile("G:"));
/*
*设置可以选择文件夹，默认为只允许选择文件
*
*DIRECTORIES_ONLY指示仅显示目录。
*FILES_AND_DIRECTORIES指示显示文件和目录
*FILES_ONLY指示仅显示文件。(默认)
*
*/
fileChooser.setFileSelectionMode(JFileChooser.DIRECTORIES_ONLY);
//把JFileChooser释放
fileChooser.showOpenDialog(this);
fileDirectory=fileChooser.getSelectedFile();
i=-1;//每次打开都将i重置方便播放文件
parentPath=fileDirectory.getAbsolutePath();
fileName=fileDirectory.list();
if(hasPicture()){
this.NextPicture();
setBottonEnabled(true);
}else{
picIcon.setText("该目录没有图片哦");
picIcon.setIcon(null);
setBottonEnabled(false);
}
}elseif(e.getSource().equals(nextPic)){
this.NextPicture();
}elseif(e.getSource().equals(previousPic)){
this.previousPicture();
}elseif(e.getSource().equals(beginPlayPic)){
this.automatic();
play=true;
}elseif(e.getSource().equals(stopPlayPic)){
play=false;
}
}
//设置按钮不可用
privatevoidsetBottonEnabled(booleanavailable){
nextPic.setEnabled(available);
previousPic.setEnabled(available);
beginPlayPic.setEnabled(available);
stopPlayPic.setEnabled(available);
}
//判断所选路径是否有图片
privatebooleanhasPicture(){
for(Strings:fileName){
if(s.matches("(?i).*(.jpg|.png|.gif|.bpm|.jpeg)$"))
returntrue;
}
returnfalse;
}
privatevoidpreviousPicture(){
if(i==0){
i=fileName.length-1;
}
while(!fileName[--i].matches("(?i).*(.jpg|.png|.gif|.bpm|.jpeg)$")){
if(i==-1){
i=fileName.length;
}
}
System.out.println(i);
picIcon.setIcon(newImageIcon(parentPath+"\\"+fileName[i]));
picIcon.setText("");
}
privatevoidNextPicture(){
if(i==fileName.length-1){
i=0;
}
while(!fileName[++i].matches("(?i).*(.jpg|.png|.gif|.bpm|.jpeg)$")){
if(i==fileName.length-1){
i=-1;
}
}
System.out.println(i);
picIcon.setIcon(newImageIcon(parentPath+"\\"+fileName[i]));
picIcon.setText("");
}
publicstaticvoidmain(String[]args){
//获取实例调用构造方法
PlayPicture.getInstance();
}
}
以上所述是小编给大家介绍的JFileChooser实现对选定文件夹内图片自动播放和暂停播放实例代码，希望对大家有所帮助，如果大家有任何疑问请给我留言，小编会及时回复大家的。在此也非常感谢大家对毛票票网站的支持！